Three of the following four are alike in a certain way and thus form a group. Which is the one that does NOT belong to that group?
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 - Operations on 13 such as adding / subtracting / multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)
- AOption (a)
18 - 37
- BOption (b)
33 - 67
- COption (c)
29 - 59
- DOption (d)
27 - 53
View answer & explanationHide answer & explanation
Correct answer
27 - 53
Why this answer is correct
The logic followed here is,
Logic: Second Number = (First Number × 2) + 1
Let's check each option as per the logic,
1) 18 - 37
→ 37 = (18 × 2) + 1
→ 37 = 36 + 1
2) 33 - 67
→ 67 = (33 × 2) + 1
→ 67 = 66 + 1
3) 29 - 59
→ 59 = (29 × 2) + 1
→ 59 = 58 + 1
4) 27 - 53
→ 53 = (27 × 2) + 1
→ 53 ≠ 54 + 1 → Doesn't satisfy the logic.
Hence, the correct answer is "27 - 53".























































